JP5044191B2 - Plate shape correction device - Google Patents

Description

  The present invention relates to a plate shape correcting device which is a kind of so-called intelligent rolling mill provided with divided backup rolls capable of individually detecting and controlling the load.

  In recent years, a rolling mill that detects the load distribution for each of the divided backup rolls divided into three or more parts, estimates the load distribution between the wide material and the work roll, and controls the plate shape based on the estimated load distribution. It is attracting attention (see, for example, Patent Document 1). In such a rolling mill, in principle, it is not necessary to detect and feed back the plate shape on the delivery side of the rolling mill, so that the plate shape can be directly controlled without time delay. Moreover, according to such a rolling mill, good plate quality, that is, good plate crown and flatness can be obtained. Such a rolling mill is called an intelligent rolling mill.

JP 2000-158019 A JP-A-2005-118822

However, in the intelligent rolling mill provided with the split backup roll having the single reduction function as described above, for example, in a rolling mill (including a straightening machine) for a wide material exceeding 5 m, a backup having a single reduction mechanism. Since the roll frame is large and heavy, there are the following problems.
1) Transport equipment such as cranes for inspection and jigs are huge and high capacity.
2) The inspection and replacement work of the backup roll becomes complicated.
3) Maintenance and inspection work for the single reduction mechanism becomes complicated.

  Accordingly, an object of the present invention is to provide a plate shape correcting device that can improve maintenance workability such as backup roll replacement and single reduction mechanism, and can realize weight reduction and capacity reduction of transportation equipment and jigs. is there.

In order to achieve the above object, a plate shape correcting device according to the present invention comprises:
At least one of the upper and lower sides has a mechanism for supporting a work roll by a divided backup roll that is divided into three or more in the axial direction, and a load detection device capable of detecting a load independently for each divided backup roll In the plate shape correction device provided with a reduction device capable of independently applying a reduction force,
Each of the divided backup rolls is supported by a carriage together with the load detection device, and the carriage is supported by a frame so that it can enter and exit in the plate width direction.
The reduction device includes an actuator unit for adjusting a reduction force and a reduction force application unit that is detachably linked to the actuator unit, the actuator unit on the frame side, and the reduction force application unit on the carriage side. characterized in that by supporting each divided and.

  The center of the plate in the width direction of the carriage is positioned on the frame at the center of the line, and the position of the plate in the entrance / exit direction is positioned perpendicular to the line direction by a cylinder built in the frame. To do.

  Each of the divided backup rolls is supported so as to be slidable in the load direction via a roll chock with respect to the carriage, the load detecting device is interposed between the roll chock and the carriage, and the work roll The roll chock is assembled by positioning the axis of each backup roll parallel to the axis.

Also, the rolling force applying portion, and an arm which is fixed to the eccentric shaft and the eccentric shaft for rotatably supporting each of the split backup rolls in the carriage, the actuator unit is rocking the actuator in the frame moving freely have supported levers, and said arm and lever, characterized in that it is linked with pinless structure.

  According to the plate shape correcting device of the present invention having the above-described configuration, the divided backup roll having a high inspection / replacement frequency is supported by the carriage, the carriage is supported by the frame having a low inspection / replacement frequency, and the reduction device is a frame. Since the carriage is divided (shared) and supported, the carriage can be reduced in size and weight, while the frame and the carriage can be separated as necessary. As a result, it is possible to improve the maintenance workability of the backup roll replacement, the single reduction mechanism and the like, and to realize the weight reduction and the capacity reduction of the transportation equipment and jigs.

  The carriage is positioned at the center of the plate in the width direction of the line at the center of the line, and the position of the input / output direction of the plate is positioned at right angles to the line direction by a cylinder built in the frame. The axial centers of the divided backup rolls are kept parallel, and the positional relationship between the frame and the carriage can always be kept constant even if the plate shape correcting device is deformed.

  Each of the divided backup rolls is supported so as to be slidable in the load direction via a roll chock with respect to the carriage, the load detecting device is interposed between the roll chock and the carriage, and the work roll Since the roll chock is assembled by positioning the axis of each backup roll in parallel with the axis, the load of each divided backup roll can be detected with high accuracy.

  In the reduction device, the arm and the lever are linked in a pinless structure, so that the frame and the carriage can be easily separated.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a plate shape correcting device according to the present invention will be described in detail with reference to the drawings.

  FIG. 1 is a side sectional view of a plate shape correcting apparatus according to an embodiment of the present invention, FIG. 2 is a side sectional view of an upper carriage, FIG. 3 is an explanatory view of a structure of a clamp mechanism, and FIG. FIG. 5 is an operation explanatory diagram when the apparatus is rolled (corrected), and FIG.

  A plate shape correcting device 10 shown in FIG. 1 is a kind of so-called intelligent rolling mill provided with divided backup rolls that can individually detect and control the load.

  More specifically, a pair of upper and lower work rolls 12a and 12b are rotatably supported via a pair of upper and lower work roll chocks 13a and 13b in a mill housing 11 that is a frame, and the pair of upper and lower work rolls 12a and 12b. A wide material from the entrance side (front side: left side in the figure) of the plate shape correction apparatus 10 to the exit side (rear side: right side in the figure) of the plate shape correction apparatus 10 through a suitable number of support rolls 14. W can pass through.

  The lower work roll chock 13b that supports the lower work roll 12b is supported by the lower carriage 52, and is supported integrally with the lower carriage 52 on the mill housing 11. A pair of front and rear divided lower backup rolls 50 are rotatably supported on the lower carriage 52. On the other hand, the upper work roll chock 13a that supports the upper work roll 12a is supported from below by a pair of front and rear lift cylinders 54 built in the lower work roll chock 13b.

  A frame 18 is supported on the mill housing 11 by a pair of front and rear hydraulic fluid pressure type balance cylinders 19 so as to be movable up and down. The frame 18 is urged downward against the urging force of the balance cylinder 19 by a pair of left and right hydraulic pressure type pressure reduction cylinders 20 supported downward on the mill housing 11 to generate a predetermined reduction force. It can be applied to the upper work roll 12a and the lower work roll 12b.

  The frame 18 has a pair of front and rear legs 18b below the block-shaped main body 18a. The upper carriage 21 is supported between the front and rear legs 18b so as to be able to enter and exit from the work side of the rolling line. It is supported by a pair of front and rear hydraulic pressure type lift cylinders 22 so as to be movable up and down.

  The upper carriage 21 is positioned and fixed with respect to the frame 18 at the position (line center) by a clamp mechanism 23 provided in the center of the front surface of the frame 18 in the plate width direction. As shown by a balloon, the upper carriage 21 is pressed against the reference surface of the rear leg portion 18b of the frame 18 by a pair of left and right pressing cylinders 56 built in the frame 18, thereby enabling positioning in the line direction. Thereby, the width direction and the line direction of the upper carriage 21 are positioned at right angles.

  As shown in FIG. 3, the clamp mechanism 23 is formed by extending a clamp cylinder 24 of a hydraulic or fluid pressure type attached horizontally to the frame 18 so that the tip of the clamp bar 25 penetrates the leg portion 18b of the frame 18. Thus, the positioning and fixing described above are achieved by fitting into a positioning hole 26 that is recessed in the front surface of the upper carriage 21.

  On the lower surface of the upper carriage 21, three or more roll chocks 27 are arranged in the plate width direction (axial direction), positioned on the entry side and the exit side of the plate shape correction device 10. A backup roll 28 is rotatably supported.

  As shown in FIG. 2, each roll chock 27 includes a bifurcated main body portion 27a in front view and a pair of left and right caps 27b coupled to the bifurcated portion of the main body portion 27a by bolts or the like. In the portion 27a, the upper carriage 21 is supported so as to be slidable in the load direction by a rod 29 coupled to the main body portion 27a and a spring 30 wound around the tip of the rod 29 (see FIG. 2). Further, a pair of left and right low friction guide mechanisms 60 such as linear guides are interposed between opposing surfaces along the load direction of the main body portion 27 a of each roll chock 27 and the upper carriage 21.

Both ends of the eccentric shaft 33 supporting the backup roll 28 concentrically in the circular hole formed by the bifurcated portion of the main body 27a and the cap 27b are rotated via bearings (not shown). It is supported freely. In the figure, C ₁ is the center of rotation of the eccentric shaft 33, C ₂ is the center of rotation of the divisional backup roll 28, and L is the eccentric distance.

  A load detection device 31 such as a load cell for detecting the load applied to each divided upper backup roll 28 is interposed between the upper surface of the main body 27 a of each roll chock 27 and the lower surface of the upper carriage 21. A plurality of the load detection devices 31 are arranged side by side in the plate width direction (axial direction) of the plate material.

  Further, a reduction device 32 is provided between the frame 18 and the upper carriage 21 to individually apply a reduction force to each divided upper backup roll 28 (see FIG. 1).

That is, the reduction device 32 uses a gap between the adjacent divided upper backup rolls 28 on one end surface of the eccentric shaft 33 that rotatably supports the divided upper backup rolls 28 in the upper carriage 21, so that the bolt (see FIG. 1 and an arm 35 (rolling force applying portion) coupled to each other, and a hydraulic or fluid pressure type rolling force adjusting cylinder (actuator) mounted horizontally on the frame 18 in the frame 18 as shown in FIG. a swingably supported lever 37 (actuator) by 36, which has a, the lower end of the upper portion and the lever 37 of each arm 35 is linked with pinless structure.

  In the illustrated example, as the pinless structure, a roller 39 supported by a pin 38 at the upper end of each arm 35 has a minute gap in a U-shaped receiving port (crocodile port) 40 formed at the lower end of each lever 37. Has been inserted. The intermediate portion of each lever 37 is coupled by a pin 42 between a pair of left and right brackets attached to the main body portion 18a of the frame 18, and the piston rod tip of the above-described reduction force adjusting cylinder 36 is pinned to the upper end portion thereof. 43.

  The reduction device 32 is used for the divided upper backup roll 28 on the entrance side of the plate shape correcting device 10 and the divided upper backup roll 28 on the exit side of the plate shape correcting device 10 in the frame 18 and the upper carriage 21 in the front-rear direction. Are alternately arranged in the left-right direction. 4 and 5 used for explanation of the action described later is a stopper for restricting the extension position in order to detect the origin position of each rolling force adjusting cylinder 36, and 45 in FIG. This is a stopper that regulates the fall position when no load is applied (when the carriage is replaced).

  As shown in FIG. 4, when the rolling reduction (correction) is performed, the reduction device 32 extends and contracts the reduction force adjusting cylinder 36, so that the lever 37 moves from the state of FIG. Swings in the direction (see FIG. 4C) or counterclockwise (see FIG. 4A), and thereby the eccentric shaft 33 (not shown in FIG. 4) is divided via the arm 35. By rotating eccentrically in the counterclockwise direction (see FIG. 4C) or clockwise (see FIG. 4A) together with the upper backup roll 28, the rolling force on the upper work roll 12a is adjusted (increased or decreased). It is like that. At this time, the roller 39 rolls up and down in the receptacle 40 and smoothly rotates the eccentric shaft 33 and the divided upper backup roll 28 eccentrically.

On the other hand, the upper carriage assembly Kawatoki, as shown in FIG. 5, only predetermined stroke rolling force adjusting cylinder 36 from the state of e.g., FIGS. 4 (a) to contract the rotational center C ₁ of the eccentric shaft 33 the arm 35 After swinging clockwise in the center (see FIG. 5A), the lift cylinder 22 is contracted to lower the upper carriage 21 relative to the frame 18 (see FIG. 5B). 39 is pulled out downward from the receiving port 40, and the upper carriage 21 is separated from the frame 18. After the roller 39 is pulled out, the arm 35 falls in the clockwise direction by its own weight, but eventually the position of the fall is restricted by the stopper 45, which hinders the operation when the upper carriage 21 is subsequently carried out to the work side of the rolling line. There is nothing.

  Further, the divided lower backup roll 50 that applies a rolling force to the lower work roll 12b is located on the entry side and the exit side of the plate shape correcting device 10 in the same manner as the division upper backup roll 28, and the plate width of the wide material W A plurality of them are arranged in the direction, but these can be freely rotated via an eccentric bushing (to be described later) having a predetermined amount of eccentricity on one roll support shaft 51 on each of the entrance side and the exit side of the plate shape correcting device 10. The structure is different from the above-described divided upper backup roll 28 that can individually adjust the rolling force in that it is supported. Such a divided backup roll 50 is already known from Patent Document 1 and the like.

  Both ends of the roll support shaft 51 are rotatably supported by the lower carriage 52, and are rotated to a required angle via a spindle or the like by a drive source (not shown) on the drive side of the rolling line. .

  The lower carriage 52 is supported so as to be able to enter and exit from the work side of the rolling line with respect to the mill housing 11, and at a predetermined position in the plate width direction of the plate material, by the clamp mechanism 53 similar to the clamp mechanism 23 described above, the mill housing 11 is positioned / fixed. The mill housing 11 positioned below the lower carriage 52 incorporates a pair of front and rear lift cylinders 55 for lifting the lower carriage 52 when the lower carriage 52 is assembled.

  Because of this configuration, during rolling (correction), the frame 18 is lowered from the state of FIG. 1 due to the contraction of the balance cylinder 19, and the plate material is placed between the upper and lower work rolls 12a and 12b in this state. Through.

  At this time, a predetermined reduction force is applied to the upper and lower work rolls 12 a and 12 b by the frame 18 being urged downward with respect to the mill housing 11 by a pair of left and right reduction cylinders 20. Further, the rolling force in the plate width direction of the plate material is adjusted by the divided upper backup roll 28 and the divided lower backup roll 50 arranged on the entry side and the exit side of the plate shape correcting device 10.

  In the divided upper backup roll 28, the load is individually detected by the load detection device 31. Then, the individual rolling force of the divided upper backup roll 28 is adjusted by the control device (not shown) through the rolling device 32 so that the individual load of the divided upper backup roll 28 becomes the target load.

  In the divided lower backup roll 50, the roll support shaft 51 is rotated to a required angle via a spindle or the like by a drive source (not shown) by a control device (not shown), and this corresponds to the eccentric amount of each eccentric bush at this time. Individually adjusted to the rolling force.

  Therefore, in particular, in the division upper backup roll 28, it is not necessary to detect and feed back the plate shape on the exit side of the plate shape correcting apparatus 10, and the plate shape can be directly controlled without time delay. Further, the divided upper backup roll 28 and divided lower backup roll 50 can be finely adjusted in the plate width direction of the plate material, and good plate quality, that is, good plate crown and flatness can be obtained.

  In this embodiment, the divided upper backup roll 28 having a high inspection / replacement frequency is supported by the upper carriage 21, the upper carriage 21 is supported by the frame 18 having a low inspection / replacement frequency, and the reduction device 32 is mounted on the frame 18. And the upper carriage 21 are divided and supported.

  Accordingly, the weight of the frame 18 and the upper carriage 21 can be reduced and the upper carriage 21 can be made as small as possible, while the frame 18 and the upper carriage 21 can be separated and handled as necessary.

  As a result, the number of divisions of the divided upper backup roll 28 is increased, and the structures such as the frame 18 and the upper carriage 21 are large and heavy. It is possible to improve the maintenance workability of the mechanism) and to reduce the weight and capacity of transportation equipment such as cranes and jigs.

  Each of the divided upper backup rolls 28 is slidably supported in the load direction with respect to the upper carriage 21 via a roll chock 27, and a load is detected between the roll chock 27 (the main body portion 27 a) and the upper carriage 21. By interposing the device 31, the load of each divided backup roll 28 can be reliably detected with high accuracy.

  In the reduction device 32, the arm 35 and the lever 37 are linked in a pinless structure, so that the frame 18 and the upper carriage 21 can be easily separated. That is, only the upper carriage 21 can be easily removed from the frame 18 when the divided upper backup roll 28 is rearranged.

  Further, by positioning the upper carriage 21 with respect to the frame 18 at the center in the plate width direction of the plate material by the clamp mechanism 23, the positional relationship between the frame 18 and the upper carriage 21 is kept constant even if the plate shape correcting device 10 is deformed. In addition, the upper carriage 21 is pressed against the reference surface of the rear leg portion 18b of the frame 18 by the pair of left and right pressing cylinders 56 built in the frame 18, whereby the positional relationship in the line direction can be kept constant. As a result, the axes of the work rolls 12a and 12b and the divided upper backup rolls 28 can be kept parallel.

  In addition, this invention is not limited to the said Example, In the range which does not deviate from the summary of this invention, the reduction apparatus 32 (single reduction mechanism) is applied to the division | segmentation backup roll 50, or the structure of the reduction apparatus 32 is changed. It goes without saying that various changes such as these are possible.

It is a sectional side view of the plate shape correction apparatus which shows one Example of this invention. It is a sectional side view of an upper carriage. It is structure explanatory drawing of a clamp mechanism. It is operation | movement explanatory drawing at the time of rolling (correction) of the reduction apparatus by the side of a division | segmentation upper backup roll. It is operation | movement explanatory drawing at the time of carriage replacement of the same pressure reducing apparatus.

Explanation of symbols

  10 plate shape correction device, 11 mil housing, 12a upper work roll, 12b lower work roll, 13a upper work roll chock, 13b lower work roll chock, 14 support roll, 18 frames, 18a legs, 18b main body, 19 balance cylinder, 20 Reduction cylinder, 21 Upper carriage, 22 Lift cylinder, 23 Clamp mechanism, 24 Clamp cylinder, 25 Clamp bar, 26 Positioning hole, 27 Roll chock, 27a Main body, 27b Cap, 28 Split upper backup roll, 29 Rod, 30 Spring, 31 Load detection device, 32 reduction device, 33 eccentric shaft, 35 arm, 36 reduction force adjustment cylinder, 37 lever, 38 pin, 39 roller, 40 receiving port, 42 pin, 43 pin, 44 stock , 45 stopper, 50 divided under backup roll, 51 roll support shaft, 52 lower carriage, 53 clamping mechanism 54 lift cylinder 55 lift cylinder 56 pressing cylinder, 60 guide mechanism.

Claims (4)

At least one of the upper and lower sides has a mechanism for supporting a work roll by a divided backup roll that is divided into three or more in the axial direction, and a load detection device capable of detecting a load independently for each divided backup roll In the plate shape correction device provided with a reduction device capable of independently applying a reduction force,
Each of the divided backup rolls is supported by a carriage together with the load detection device, and the carriage is supported by a frame so that it can enter and exit in the plate width direction.
The reduction device includes an actuator unit for adjusting a reduction force and a reduction force application unit that is detachably linked to the actuator unit, the actuator unit on the frame side, and the reduction force application unit on the carriage side. plate-shaped orthotic device which is characterized in that by supporting each divided and.   The center of the carriage in the plate width direction is positioned at the line center of the frame, and the position of the plate in the entrance / exit direction is positioned perpendicular to the line direction by a cylinder built in the frame. Item 1. The plate shape correcting apparatus according to Item 1.   Each of the divided backup rolls is supported so as to be slidable in the load direction with respect to the carriage via a roll chock, the load detection device is interposed between the roll chock and the carriage, and the axis of the work roll 3. The plate shape correcting device according to claim 1, wherein the roll chock is assembled by positioning the axis of each backup roll in parallel. The rolling force applying portion, and an arm which is fixed to the eccentric shaft and the eccentric shaft for rotatably supporting each of the split backup rolls in the carriage, the actuator unit is swingable by an actuator in said frame has levers supported on, and a plate shape correction device according to claim 1, wherein said arm and lever, characterized in that it is linked with pinless structure.

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